Okay, people seem to be disagreeing with my OCD/phobias/depression point. I would like to point out that I haven't just pulled this out of my a*s, it is what an actual Clinical Psychologist told me. Yes, this could change in the future, and I would like Clin Psychs to branch out because I think they have an important role to play, but at the moment, most psychological disorders such as schizophrenia are treated with drugs, which can only be prescribed by people with medical degrees.
My advice to the OP would be to do your Psych degree, and if, at the end, you still want to be a Clin Psych, have a go! As it is, you haven't been to Uni yet, anything can happen in the next three years, you could completely change your mind.